Question

Java code Guessing Game Refinement. (The user thinks of a number and the program guesses it) Program should be able to guess correctly in 7 tries or lower.

Initialize a variable that represents the lowest possible number to 0 (what type should this be?) Initialize a variable that represent the highest possible number to 100 (what type should this be?) Initialize a Boolean variable that represents if we've achieved the correct guess to false Initialize a variable in which to store the number of guesses we've made to O Declare a variable in which to store an initial guess Declare a variable to store user input (make this an int) Initialize a Scanner object (call the variable you assign it to "input" for consistency with class examples) Prompt the user to choose a number (this is simply output - the program shouldn't know the number) Make an initial guess and store it. Increment the value in the variable storing number of guesses. Present guess to the user Present prompt to user("Enter 1 if this was a correct guess, 2 if your number is higher, and 3 if your number is lower:") Use Scanner to grab the next to the user types in, and store it If the user has typed in a "1" Change the value of the Boolean variable (correctGuess) to true. While we haven't guessed the correct number correctGuess-false) Modify range for next guess Generate a next guess Present guess to the user Present prompt to user("Enter 1 if this was a correct guess, 2 if your number is higher, and 3 if your number is lower:) Use Scanner to grab the nextInt() the user types in, and store it. If the user has typed in a "1" Change the value of the Boolean variable (correctGuess) to true. Print out how many steps it took to guess the number

Initialize a variable that represents the lowest possible number to 0 (what type should this be?)

Initialize a variable that represent the highest possible number to 100 (what type should this be?)

Initialize a Boolean variable that represents if we’ve achieved the correct guess to false

Initialize a variable in which to store the number of guesses we’ve made to 0

Declare a variable in which to store an initial guess

Declare a variable to store user input (make this an int)

Initialize a Scanner object (call the variable you assign it to “input” for consistency with class examples)

Prompt the user to choose a number (this is simply output – the program shouldn’t know the number)

Make an initial guess and store it.

Increment the value in the variable storing number of guesses.

Present guess to the user

Present prompt to user (“Enter 1 if this was a correct guess, 2 if your number is higher, and 3 if your number is lower:”) Use Scanner to grab the nextInt() the user types in, and store it.

If the user has typed in a “1”

Change the value of the Boolean variable (correctGuess) to true.

While we haven’t guessed the correct number (correctGuess == false)

Modify range for next guess

Generate a next guess

Present guess to the user

Present prompt to user (“Enter 1 if this was a correct guess, 2 if your number is higher, and 3 if your number is lower:”)

Use Scanner to grab the nextInt() the user types in, and store it.

If the user has typed in a “1”

Change the value of the Boolean variable (correctGuess) to true.

Print out how many steps it took to guess the number

Answer 1

PROGRAM:

package abc.answers.Programs;

import java.util.Scanner;

public class GuessNumber {
    public static void main(String[] args) {
        // lowest and highest possible numbers
        int low = 0, high = 100;

        // boolean variable that represents if we’ve achieved the correct guess
        boolean correctGuess = false;

        // variable to store the number of guesses we’ve made
        int countGuess = 0;

        //  variable to store an initial guess and user input
        int initialGuess, userInput;

        // Initializing a Scanner object
        Scanner input = new Scanner(System.in);
        // Prompt the user to choose a number
        System.out.println("Think a number between 0 and 100.");
    
        // declaring an array to store all possible guesses
        int[] arr = new int[101];
        // initializing the array with elements
        for(int i = 0; i <= 100; i++)
            arr[i] = i;
    
        // lower index of array
        int lower = 0;
        // upper index of array
        int upper = 100;
    
        // will execute at least once
        do {
            // find the middle index of array range between lower and upper
            int middle = (lower + (upper - lower) / 2);
            // make initialGuess as the element stored with the middle index
            initialGuess = arr[middle];
            // increment counter
            countGuess++;
            
            // present guess to the user
            System.out.println("Is " + initialGuess + " the number?");
            System.out.println("Enter 1 if this was a correct guess, 2 if your number is higher, and 3 if your number is lower:");
            
            // storing user input
            userInput = input.nextInt();
            
            // choosing the correct option to proceed
            if(userInput == 1){
                correctGuess = true;
                System.out.println("Guessed correctly in " + countGuess + " tries!");
            }
            else if(userInput == 2){
                // if user number is higher then update the lower limit
                lower = middle + 1;
            }
            else if(userInput == 3){
                // if user number is lower then update the upper limit
                upper = middle - 1;
            }
        }
        // loop till the number is correctly guessed
        while(correctGuess == false);
    }
}

SCREENSHOTS:

OUTPUT:

Case 1: Guess is 100

Case 2: Guess is 0

Case 3: Guess is 48

CHANGE THE PACKAGE NAME ACCORDINGLY.

HOPE THIS HELPS!